{"id":12246,"date":"2024-07-30T14:01:06","date_gmt":"2024-07-30T06:01:06","guid":{"rendered":"https:\/\/www.mateksys.com\/?post_type=portfolio&#038;p=12246"},"modified":"2026-01-19T12:51:27","modified_gmt":"2026-01-19T04:51:27","slug":"mr900-22","status":"publish","type":"portfolio","link":"https:\/\/www.mateksys.com\/?portfolio=mr900-22","title":{"rendered":"(EOL) mLRS MAVLink 900MHz Receiver, mR900-22"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lz6prw5m-efa1ef17878b64e29b706423b59ad2b3\">\n#top .av-special-heading.av-lz6prw5m-efa1ef17878b64e29b706423b59ad2b3{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-lz6prw5m-efa1ef17878b64e29b706423b59ad2b3 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-lz6prw5m-efa1ef17878b64e29b706423b59ad2b3 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-lz6prw5m-efa1ef17878b64e29b706423b59ad2b3 av-special-heading-h2 blockquote modern-quote modern-centered  avia-builder-el-0  el_before_av_slideshow  avia-builder-el-first '><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >mLRS MAVLink 900MHz Receiver, mR900-22<\/h2><div class='av-subheading av-subheading_below'><p>mLRS (MAVLink long range system) firmware, 900 MHz LoRa, 22 dBm RF power<\/p>\n<\/div><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n<div  class='avia-slideshow av-lz6px23e-ec7f056b5a351955edfdb8aa9d2d0d05 avia-slideshow-featured av_slideshow avia-slide-slider  avia-builder-el-1  el_after_av_heading  el_before_av_icon_box  av-slideshow-ui av-control-default av-slideshow-manual av-loop-once av-loop-manual-endless av-default-height-applied avia-slideshow-1' data-slideshow-options=\"{&quot;animation&quot;:&quot;slide&quot;,&quot;autoplay&quot;:false,&quot;loop_autoplay&quot;:&quot;once&quot;,&quot;interval&quot;:5,&quot;loop_manual&quot;:&quot;manual-endless&quot;,&quot;autoplay_stopper&quot;:false,&quot;noNavigation&quot;:false,&quot;bg_slider&quot;:false,&quot;keep_padding&quot;:false,&quot;hoverpause&quot;:false,&quot;show_slide_delay&quot;:0}\"  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><ul class='avia-slideshow-inner ' style='padding-bottom: 40%;'><li  class='avia-slideshow-slide av-lz6px23e-ec7f056b5a351955edfdb8aa9d2d0d05__0  slide-1 slide-odd'><div data-rel='slideshow-1' class='avia-slide-wrap '   ><img fetchpriority=\"high\" class=\"wp-image-12250 avia-img-lazy-loading-not-12250\"  src='https:\/\/www.mateksys.com\/wp-content\/uploads\/2024\/07\/mR900-22_1.jpg' width='1075' height='430' title='mR900-22_1' alt=''  itemprop=\"thumbnailUrl\"   \/><\/div><\/li><li  class='avia-slideshow-slide av-lz6px23e-ec7f056b5a351955edfdb8aa9d2d0d05__1  slide-2 slide-even'><div data-rel='slideshow-1' class='avia-slide-wrap '   ><img fetchpriority=\"high\" class=\"wp-image-12251 avia-img-lazy-loading-not-12251\"  src='https:\/\/www.mateksys.com\/wp-content\/uploads\/2024\/07\/mR900-22_2.jpg' width='1075' height='430' title='mR900-22_2' alt=''  itemprop=\"thumbnailUrl\"   \/><\/div><\/li><li  class='avia-slideshow-slide av-lz6px23e-ec7f056b5a351955edfdb8aa9d2d0d05__2  slide-3 slide-odd'><div data-rel='slideshow-1' class='avia-slide-wrap '   ><img fetchpriority=\"high\" class=\"wp-image-12249 avia-img-lazy-loading-not-12249\"  src='https:\/\/www.mateksys.com\/wp-content\/uploads\/2024\/07\/mR900-22_3.jpg' width='1075' height='430' title='mR900-22_3' alt=''  itemprop=\"thumbnailUrl\"   \/><\/div><\/li><\/ul><div class='avia-slideshow-arrows avia-slideshow-controls' ><a href='#prev' class='prev-slide ' aria-hidden='true' data-av_icon='\ue87c' data-av_iconfont='entypo-fontello'  tabindex='-1'>\u4e0a\u4e00\u9875<\/a><a href='#next' class='next-slide ' aria-hidden='true' data-av_icon='\ue87d' data-av_iconfont='entypo-fontello'  tabindex='-1'>\u4e0b\u4e00\u9875<\/a><\/div><div class='avia-slideshow-dots avia-slideshow-controls'><a href='#1' class='goto-slide active' >1<\/a><a href='#2' class='goto-slide ' >2<\/a><a href='#3' class='goto-slide ' >3<\/a><\/div><\/div>\n<article  class='iconbox iconbox_left av-lz7yy1rv-de2b7b263647b0fec87b9de36cb171b0  avia-builder-el-2  el_after_av_slideshow  el_before_av_tab_container '  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class=\"iconbox_content\"><header class=\"entry-content-header\"><div class=\"iconbox_icon heading-color\" aria-hidden='true' data-av_icon='\ue83e' data-av_iconfont='entypo-fontello'><\/div><h3 class='iconbox_content_title '  itemprop=\"headline\" >Warning<\/h3><\/header><div class='iconbox_content_container '  itemprop=\"text\" ><p><span style=\"color: #ff0000;\">MATEKSYS mLRS 900MHz series using <strong>SX126x\/STM32WLE5<\/strong> LoRa chip are <strong>NOT compatible<\/strong> with <strong>ELRS 900MHz \/ Frsky R9 series using the SX127x<\/strong>. They will not bind with each other.<\/span><\/p>\n<ul dir=\"auto\">\n<li><a href=\"https:\/\/github.com\/olliw42\/mLRS-docu\/blob\/master\/docs\/SX126x_SX127x_INCOMPATIBILITY.md\" target=\"_blank\" rel=\"noopener\">https:\/\/github.com\/olliw42\/mLRS-docu\/blob\/master\/docs\/SX126x_SX127x_INCOMPATIBILITY.md<\/a><\/li>\n<\/ul>\n<p><span style=\"color: #0000ff;\">LoRa chip SX126x(e.g. mR900-30, E22) and STM32WLE5xx(e.g. mR900-22, WIO-E5, E77) are compatible with each other.<\/span><\/p>\n<\/div><\/div><footer class=\"entry-footer\"><\/footer><\/article>\n<div  class='tabcontainer av-lz6py1mr-c661b44b211ac9580dfd6eb967321df7 top_tab  avia-builder-el-3  el_after_av_icon_box  avia-builder-el-last ' role='tablist'>\n<section class='av_tab_section av_tab_section av-181fg71-279ad96c3c756277b0e1d2f934808d29'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='tab active_tab' role='tab' tabindex='0' data-fake-id='#tab-id-1' aria-controls='tab-id-1-content'  itemprop=\"headline\" >Specifications<\/div><div id='tab-id-1-content' class='tab_content active_tab_content' aria-hidden=\"false\"><div class='tab_inner_content invers-color'  itemprop=\"text\" ><h4>Specifications<\/h4>\n<ul>\n<li>STM32WLE5CC with TCXO,\u00a0 mLRS firmware<\/li>\n<li>RF Frequency: 900MHz (868MHz, 915MHz FCC)<\/li>\n<li>RF power: -9dBm(min) \/ 0dBm \/ 10dBm \/ 20dBm \/ 22dBm(158mW)<\/li>\n<li>Antenna connector: IPEX MHF-1<\/li>\n<li>TX2\/RX2: Bi-directional Serial MAVLink<\/li>\n<li>TX1: RC out(CRSF or SBUS)<\/li>\n<li>2x buttons for Boot mode and Bind<\/li>\n<\/ul>\n<ul>\n<li>Power supply: 4-9V DC @ \u201cV\u201d Pad<\/li>\n<li>Power dissipation:\u00a0 Average 67mA\/Peak 170mA@5V IN(31Hz, 22dbm)<\/li>\n<li>PCB Size: 24 x 15.5 mm<\/li>\n<li>Weight: 2.3g w\/ antenna<\/li>\n<\/ul>\n<ul>\n<li>Packing:\n<ul>\n<li>1x mR900-22<\/li>\n<li>1x IPEX MHF1 dipole antenna. 8cm<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>LED Status<\/h4>\n<ul>\n<li>[Red flashing 2Hz], not connected to transmitter<\/li>\n<li>[Green flashing 1Hz], connected to transmitter<\/li>\n<li>[Red and Green alternately ], Binding mode enabled<\/li>\n<\/ul>\n<h4>Binding<\/h4>\n<ul dir=\"auto\">\n<li>After powering on,\u00a0 press the bind button (for ca. 4 seconds) on the receiver. When in bind mode, the green and red LEDs will blink alternatively with ca 2.5 Hz.<\/li>\n<li><a href=\"https:\/\/github.com\/olliw42\/mLRS-docu\/blob\/master\/docs\/BINDING.md\" target=\"_blank\" rel=\"noopener\">https:\/\/github.com\/olliw42\/mLRS-docu\/blob\/master\/docs\/BINDING.md<\/a><\/li>\n<\/ul>\n<h4>Firmware<\/h4>\n<ul>\n<li>mLRS <a href=\"https:\/\/github.com\/olliw42\/mLRS\/tree\/main\/firmware\/pre-release-stm32\" target=\"_blank\" rel=\"noopener\">https:\/\/github.com\/olliw42\/mLRS\/tree\/main\/firmware\/pre-release-stm32<\/a><\/li>\n<li>Targets:\u00a0 \u00a0<strong>rx-matek-mr900-22-wle5cc-xxx<\/strong><\/li>\n<\/ul>\n<h4>Tips<\/h4>\n<ul>\n<li><a href=\"https:\/\/github.com\/olliw42\/mLRS\" target=\"_blank\" rel=\"noopener\">mLRS Github<\/a>\u00a0 &amp; <a href=\"https:\/\/github.com\/olliw42\/mLRS-docu\/tree\/master\" target=\"_blank\" rel=\"noopener\">Documentation<\/a><\/li>\n<li><a href=\"https:\/\/discord.com\/invite\/vwjzCD6ws5\" target=\"_blank\" rel=\"noopener\">mLRS Discord<\/a><\/li>\n<li><a href=\"https:\/\/www.facebook.com\/groups\/mlrslink\/\" target=\"_blank\" rel=\"noopener\">mLRS Facebook group<\/a><\/li>\n<li>If set RF power &gt;=500mW, It is recommended to attach the heatsink to the bottom side of PCB. The gaps between fins can be used for mounting with M3 screws<\/li>\n<li><span style=\"color: #0000ff;\">mR900-22 is NOT compatible with ELRS 900MHz \/ Frsky R9 series using the SX127x. They will not bind with each other.<\/span><\/li>\n<\/ul>\n<h4 id=\"flashing-via-uart\"><\/h4>\n<\/div><\/div><\/section>\n<section class='av_tab_section av_tab_section av-lz80t23k-a0d1ada0b89dd49b222f0012597a3d17'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='tab' role='tab' tabindex='0' data-fake-id='#tab-id-2' aria-controls='tab-id-2-content'  itemprop=\"headline\" >Wiring<\/div><div id='tab-id-2-content' class='tab_content' aria-hidden=\"true\"><div class='tab_inner_content invers-color'  itemprop=\"text\" ><p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-12263\" src=\"https:\/\/www.mateksys.com\/wp-content\/uploads\/2024\/07\/mR900-22_w.jpg\" alt=\"\" width=\"1500\" height=\"600\" \/><\/p>\n<\/div><\/div><\/section>\n<section class='av_tab_section av_tab_section av-lzdu2jo8-58b9fa93b4c7a193958c8e4241c7396c'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='tab' role='tab' tabindex='0' data-fake-id='#tab-id-3' aria-controls='tab-id-3-content'  itemprop=\"headline\" >Modes &amp; Link Rate<\/div><div id='tab-id-3-content' class='tab_content' aria-hidden=\"true\"><div class='tab_inner_content invers-color'  itemprop=\"text\" ><table width=\"823\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" width=\"143\"><\/td>\n<td style=\"text-align: center;\" width=\"136\">50 Hz<\/td>\n<td style=\"text-align: center;\" width=\"136\">31 Hz<\/td>\n<td style=\"text-align: center;\" width=\"136\">19 Hz<\/td>\n<td style=\"text-align: center;\" width=\"136\">FLRC (111 Hz)<\/td>\n<td style=\"text-align: center;\" width=\"136\">FSK (50 Hz)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" rowspan=\"3\">frequency bands<\/td>\n<td style=\"text-align: center;\">2.4 GHz<\/td>\n<td style=\"text-align: center;\">2.4 GHz<\/td>\n<td style=\"text-align: center;\">2.4 GHz<\/td>\n<td style=\"text-align: center;\">2.4 GHz<\/td>\n<td style=\"text-align: center;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\/<\/td>\n<td style=\"text-align: center;\" width=\"136\">915\/868 MHz<\/td>\n<td style=\"text-align: center;\">915\/868 MHz<\/td>\n<td style=\"text-align: center;\">\/<\/td>\n<td style=\"text-align: center;\">915\/868 MHz<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\/<\/td>\n<td style=\"text-align: center;\">433 MHz\/70 cm<\/td>\n<td style=\"text-align: center;\">433 MHz\/70 cm<\/td>\n<td style=\"text-align: center;\">\/<\/td>\n<td style=\"text-align: center;\">433 MHz\/70 cm<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\" rowspan=\"4\">chip sets<\/td>\n<td style=\"text-align: center;\">SX128x<\/td>\n<td style=\"text-align: center;\" width=\"136\">SX128x<\/td>\n<td style=\"text-align: center;\" width=\"136\">SX128x<\/td>\n<td style=\"text-align: center;\">SX128x<\/td>\n<td style=\"text-align: center;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\/<\/td>\n<td style=\"text-align: center;\" width=\"136\">SX126x\/LLCC68<\/td>\n<td style=\"text-align: center;\" width=\"136\">SX126x\/LLCC68<\/td>\n<td style=\"text-align: center;\">\/<\/td>\n<td style=\"text-align: center;\">SX126x\/LLCC68<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\/<\/td>\n<td style=\"text-align: center;\" width=\"136\">STM32WLE5<\/td>\n<td style=\"text-align: center;\" width=\"136\">STM32WLE5<\/td>\n<td style=\"text-align: center;\">\/<\/td>\n<td style=\"text-align: center;\" width=\"136\">STM32WLE5<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">\/<\/td>\n<td style=\"text-align: center;\">\/<\/td>\n<td style=\"text-align: center;\" width=\"136\">SX1276<\/td>\n<td style=\"text-align: center;\">\/<\/td>\n<td style=\"text-align: center;\"><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">downlink serial rate<\/td>\n<td style=\"text-align: center;\">4100 Bytes\/sec<\/td>\n<td style=\"text-align: center;\">2562 Bytes\/sec<\/td>\n<td style=\"text-align: center;\">1547 Bytes\/sec<\/td>\n<td style=\"text-align: center;\">9111 Bytes\/sec<\/td>\n<td style=\"text-align: center;\">4100 Bytes\/sec<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">uplink serial rate<\/td>\n<td style=\"text-align: center;\">3200 Bytes\/sec<\/td>\n<td style=\"text-align: center;\">2000 Bytes\/sec<\/td>\n<td style=\"text-align: center;\">1207 Bytes\/sec<\/td>\n<td style=\"text-align: center;\">7111 Bytes\/sec<\/td>\n<td style=\"text-align: center;\">3200 Bytes\/sec<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">receiver sensitivity<\/td>\n<td style=\"text-align: center;\">-105 dBm<\/td>\n<td style=\"text-align: center;\">-108 dBm<\/td>\n<td style=\"text-align: center;\">-112 dBm<\/td>\n<td style=\"text-align: center;\">not for LR<\/td>\n<td style=\"text-align: center;\">not for LR<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div><\/section>\n<section class='av_tab_section av_tab_section av-lz6qidrc-dcfbe6fc1fffc5554d4ad69d6ef09e3d'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='tab' role='tab' tabindex='0' data-fake-id='#tab-id-4' aria-controls='tab-id-4-content'  itemprop=\"headline\" >Firmware flashing <\/div><div id='tab-id-4-content' class='tab_content' aria-hidden=\"true\"><div class='tab_inner_content invers-color'  itemprop=\"text\" ><p>Download STM32CubeProgrammer from ST website<\/p>\n<ul>\n<li><a href=\"https:\/\/www.st.com\/en\/development-tools\/stm32cubeprog.html\" target=\"_blank\" rel=\"noopener\">https:\/\/www.st.com\/en\/development-tools\/stm32cubeprog.html<\/a><\/li>\n<\/ul>\n<p>mLRS firmware:<\/p>\n<ul>\n<li><a href=\"https:\/\/github.com\/olliw42\/mLRS\/tree\/main\/firmware\/pre-release-stm32\" target=\"_blank\" rel=\"noopener\">https:\/\/github.com\/olliw42\/mLRS\/tree\/main\/firmware\/pre-release-stm32<\/a><\/li>\n<li>Targets:\u00a0 \u00a0rx-matek-mr900-22-wle5cc-xxx<\/li>\n<\/ul>\n<p>\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014<\/p>\n<p>Connect the mR900-22 to USB-TTL module (e.g.CP210x, FTDI)<\/p>\n<ul>\n<li>mR900-22 RX2\u00a0 \u2014\u00a0 USB-TTL module TX<\/li>\n<li>mR900-22 TX2\u00a0 \u2014\u00a0 USB-TTL module RX<\/li>\n<li>mR900-22\u00a0 V\u00a0 \u00a0\u2014\u00a0 USB-TTL module 5V<\/li>\n<li>mR900-22\u00a0 G\u00a0 \u00a0\u2014\u00a0 USB-TTL module GND<\/li>\n<\/ul>\n<p>Connect USB-TTL module to computer while holding the receiver boot button in.<\/p>\n<ol>\n<li>Select <strong>UART<\/strong><\/li>\n<li>Select the <strong>COM port of USB-TTL module<\/strong><\/li>\n<li>Connect<\/li>\n<li>select \u201cErasing &amp; Programming\u201d<\/li>\n<li>Tick all sectors and click &#8220;erase selected sectors&#8221;<\/li>\n<li>Browse firmware (hex or bin file) related to the hardware.<\/li>\n<li>Click \u201cStart Programming\u201d<\/li>\n<li>After programming, unplug USB and plug USB back in. If red LED blinks at 2Hz, the receiver is waiting for connecting with transmitter.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-12253\" src=\"https:\/\/www.mateksys.com\/wp-content\/uploads\/2024\/07\/mlRS_flashing_UART.jpg\" alt=\"\" width=\"1216\" height=\"789\" \/><\/p>\n<\/div><\/div><\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"featured_media":12254,"comment_status":"closed","ping_status":"closed","template":"","tags":[241,239,238,237],"portfolio_entries":[42],"class_list":["post-12246","portfolio","type-portfolio","status-publish","has-post-thumbnail","hentry","tag-22dbm","tag-900mhz","tag-mavlink","tag-mlrs","portfolio_entries-discontinued"],"_links":{"self":[{"href":"https:\/\/www.mateksys.com\/index.php?rest_route=\/wp\/v2\/portfolio\/12246","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mateksys.com\/index.php?rest_route=\/wp\/v2\/portfolio"}],"about":[{"href":"https:\/\/www.mateksys.com\/index.php?rest_route=\/wp\/v2\/types\/portfolio"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mateksys.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12246"}],"version-history":[{"count":4,"href":"https:\/\/www.mateksys.com\/index.php?rest_route=\/wp\/v2\/portfolio\/12246\/revisions"}],"predecessor-version":[{"id":13148,"href":"https:\/\/www.mateksys.com\/index.php?rest_route=\/wp\/v2\/portfolio\/12246\/revisions\/13148"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mateksys.com\/index.php?rest_route=\/wp\/v2\/media\/12254"}],"wp:attachment":[{"href":"https:\/\/www.mateksys.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12246"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mateksys.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12246"},{"taxonomy":"portfolio_entries","embeddable":true,"href":"https:\/\/www.mateksys.com\/index.php?rest_route=%2Fwp%2Fv2%2Fportfolio_entries&post=12246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}